<?php
 	include_once "page.php";
 	class FirstPage extends Page{
 		public function __construct(){
 			parent::__construct("输入用户名");
 		}
 		public function DisplayContent(){
 		?>
 	<form action="vote.php" method="post">
 		<table>
 			<tr>
 				<td>用户名:</td>
 				<td><input type="text" name="username"></td>
 			</tr>
 			<tr>
 				<td colspan="2"><button type="submit">下一步</button></td>
 			</tr>
 		</table>
 	</form>
 	<?php
 	}
 	}